*{
  margin: 0;
  padding: 0;
  list-style: none;
}
html,body,#root,.App,.scroll,.main{
  width: 100%;
  height: 100%;
}
.scroll{
  overflow: hidden;
}
.scroll ul li{
  width: 100%;
  height: 140px;
  display: flex;
  align-items: center;
}
.scroll ul li img{
  width: 100px;
  height: 100px;
}

.tab ul{
  width: 100%;
  height: 50px;
  display: flex;

align-items: center;
}
.tab ul li{
  flex:1;
  margin: 0 20px;
}
.main{
  overflow: hidden;
}

.main ul li img{
  width: 100px;
  height: 150px;
}
.on{
  color: red;
}